compare_access_paths.h File Reference

#include <assert.h>
#include <stdint.h>
#include <cmath>
#include "sql/join_optimizer/access_path.h"
#include "sql/join_optimizer/interesting_orders.h"

Go to the source code of this file.

Enumerations
enum class	FuzzyComparisonResult : uint32_t {   IDENTICAL = 0 , FIRST_BETTER = 1 , SECOND_BETTER = 2 , FIRST_SLIGHTLY_BETTER = 4 ,   SECOND_SLIGHTLY_BETTER = 8 }
enum class	PathComparisonResult { FIRST_DOMINATES , SECOND_DOMINATES , DIFFERENT_STRENGTHS , IDENTICAL }

Functions
FuzzyComparisonResult	FuzzyComparison (double x, double y, double fuzz_factor)
PathComparisonResult	CompareAccessPaths (const LogicalOrderings &orderings, const AccessPath &a, const AccessPath &b, OrderingSet obsolete_orderings)

Enumeration Type Documentation

FuzzyComparisonResult

enum class FuzzyComparisonResult : uint32_t

strong

Enumerator
IDENTICAL
FIRST_BETTER
SECOND_BETTER
FIRST_SLIGHTLY_BETTER
SECOND_SLIGHTLY_BETTER

PathComparisonResult

enum class PathComparisonResult

strong

Enumerator
FIRST_DOMINATES
SECOND_DOMINATES
DIFFERENT_STRENGTHS
IDENTICAL

Function Documentation

CompareAccessPaths()

PathComparisonResult CompareAccessPaths	(	const LogicalOrderings &	orderings,
		const AccessPath &	a,
		const AccessPath &	b,
		OrderingSet	obsolete_orderings
	)

FuzzyComparison()

FuzzyComparisonResult FuzzyComparison ( double  x, double  y, double  fuzz_factor  )

inline